Magisk/scripts/magisk_uninstaller.sh
2017-09-16 03:48:58 +08:00

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#!/system/bin/sh
##########################################################################################
#
# Magisk Uninstaller
# by topjohnwu
#
# This script can be placed in /cache/magisk_uninstaller.sh
# The Magisk main binary will pick up the script, and uninstall itself, following a reboot
# This script can also be used in flashable zip with the uninstaller_loader.sh
#
# This script will try to do restoration with the following:
# 1-1. Find and restore the original stock boot image dump (OTA proof)
# 1-2. If 1-1 fails, restore ramdisk from the internal backup
# (ramdisk fully restored, not OTA friendly)
# 1-3. If 1-2 fails, it will remove added files in ramdisk, however modified files
# are remained modified, because we have no backups. By doing so, Magisk will
# not be started at boot, but this isn't actually 100% cleaned up
# 2. Remove all Magisk related files
# (The list is LARGE, most likely due to bad decision in early versions
# the latest versions has much less bloat to cleanup)
#
##########################################################################################
[ -z $BOOTMODE ] && BOOTMODE=false
MAGISKBIN=/data/magisk
CHROMEDIR=$MAGISKBIN/chromeos
if [ ! -f $MAGISKBIN/magiskboot -o ! -f $MAGISKBIN/util_functions.sh ]; then
echo "! Cannot find $MAGISKBIN"
exit 1
fi
if $BOOTMODE; then
# Load utility functions
. $MAGISKBIN/util_functions.sh
boot_actions
mount_partitions
else
recovery_actions
fi
cd $MAGISKBIN
# Find the boot image
find_boot_image
[ -z $BOOTIMAGE ] && abort "! Unable to detect boot image"
ui_print "- Found Boot Image: $BOOTIMAGE"
migrate_boot_backup
ui_print "- Unpacking boot image"
./magiskboot --unpack "$BOOTIMAGE"
CHROMEOS=false
case $? in
1 )
abort "! Unable to unpack boot image"
;;
2 )
CHROMEOS=true
;;
3 )
ui_print "! Sony ELF32 format detected"
abort "! Please use BootBridge from @AdrianDC to flash Magisk"
;;
4 )
ui_print "! Sony ELF64 format detected"
abort "! Stock kernel cannot be patched, please use a custom kernel"
esac
# Detect boot image state
ui_print "- Checking ramdisk status"
./magiskboot --cpio-test ramdisk.cpio
case $? in
0 ) # Stock boot
ui_print "- Stock boot image detected!"
abort "! Magisk is not installed!"
;;
1 ) # Magisk patched
ui_print "- Magisk patched image detected!"
# Find SHA1 of stock boot image
[ -z $SHA1 ] && SHA1=`./magiskboot --cpio-stocksha1 ramdisk.cpio 2>/dev/null`
[ ! -z $SHA1 ] && STOCKDUMP=/data/stock_boot_${SHA1}.img
if [ -f ${STOCKDUMP}.gz ]; then
ui_print "- Boot image backup found!"
./magiskboot --decompress ${STOCKDUMP}.gz new-boot.img
else
ui_print "! Boot image backup unavailable"
ui_print "- Restoring ramdisk with internal backup"
./magiskboot --cpio-restore ramdisk.cpio
./magiskboot --repack $BOOTIMAGE new-boot.img
fi
;;
2 ) # Other patched
ui_print "! Boot image patched by other programs!"
abort "! Cannot uninstall"
;;
esac
# Sign chromeos boot
$CHROMEOS && sign_chromeos
ui_print "- Flashing stock/reverted image"
if [ -L "$BOOTIMAGE" ]; then
dd if=new-boot.img of="$BOOTIMAGE" bs=4096
else
cat new-boot.img /dev/zero | dd of="$BOOTIMAGE" bs=4096 >/dev/null 2>&1
fi
rm -f new-boot.img
cd /
ui_print "- Removing Magisk files"
rm -rf /cache/magisk.log /cache/last_magisk.log /cache/magiskhide.log /cache/.disable_magisk \
/cache/magisk /cache/magisk_merge /cache/magisk_mount /cache/unblock /cache/magisk_uninstaller.sh \
/data/Magisk.apk /data/magisk.apk /data/magisk.img /data/magisk_merge.img /data/magisk_debug.log \
/data/busybox /data/magisk /data/custom_ramdisk_patch.sh /data/property/*magisk* \
/data/app/com.topjohnwu.magisk* /data/user*/*/com.topjohnwu.magisk 2>/dev/null
$BOOTMODE && reboot || recovery_cleanup